CVE-2026-125222

FFmpeg through 9.0.2 Heap Buffer Overflow via hap_parse_frame_header()

FFmpeg through 9.0.2 contains an integer overflow vulnerability in hap_parse_frame_header() in libavcodec/hapdec.c that allows attackers to trigger a heap buffer overflow on 32-bit builds. Attackers can craft Hap video frames with Snappy length prefixes that wrap tex_size, causing decompress_chunks_thread() to write outside tex_buf and crash the application or potentially execute code.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125218

FFmpeg through 9.0.2 APNG Encoder Heap Buffer Overflow via encode_apng()

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in the APNG encoder's encode_apng() function in libavcodec/pngenc.c when frame size changes mid-stream. Attackers can supply crafted media whose resolution grows mid-stream, causing APNG_DISPOSE_OP_BACKGROUND memset writes past prev_frame and crashing or corrupting heap memory in transcoding applications.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125217

FFmpeg through 9.0.2 RoQ DPCM Encoder Uninitialized Heap Memory Disclosure

FFmpeg through 9.0.2 contains an uninitialized memory use vulnerability in roq_dpcm_encode_frame() in libavcodec/roqaudioenc.c that encodes stale heap contents when flushed early. Attackers can supply short audio streams under eight frames for RoQ DPCM transcoding, causing DPCM-quantized uninitialized heap data from frame_buffer to leak into output packets.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125214

FFmpeg through 9.0.2 Heap Buffer Overflow in Blu-ray PCM Decoder

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in pcm_bluray_decode_frame() in libavcodec/pcm-bluray.c on big-endian hosts. Attackers can supply a crafted Blu-ray (M2TS) LPCM stream whose payload length is not a multiple of the sample size, writing attacker-controlled bytes past the audio frame buffer.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125213

FFmpeg through 9.0.2 Heap Buffer Overflow via PSD Decoder RLE Path

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in the PSD decoder in libavcodec/psd.c that allows attackers to corrupt heap memory on 32-bit builds by supplying a crafted PSD image. Attackers can choose dimensions and channel counts whose product exceeds 4 GB, truncating the av_malloc allocation size so decode_rle() writes attacker-controlled data past the buffer, causing crashes or possible code execution.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125210

FFmpeg through 9.0.2 Heap Overflow in libaribcaption Text Subtitle Decoding

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in aribcaption_trans_text_subtitle() in libavcodec/libaribcaption.c when decoding with sub_type text. Attackers can supply a crafted ARIB STD-B24 caption stream with zero regions, causing a pointer write past a zero-sized sub->rects allocation and corrupting heap memory.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125209

FFmpeg before 8.1.3 and 9.x before 9.0.2 Heap Buffer Overflow via dvdsubenc.c

FFmpeg before 8.1.3 and 9.x before 9.0.2 contains a heap buffer overflow vulnerability in the DVD subtitle encoder that underestimates RLE output size for odd-width rectangles. Attackers can supply files with crafted bitmap subtitles that, when transcoded to the dvdsub encoder, write past the output buffer and corrupt heap memory.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125206

FFmpeg through 9.0.2 Out-of-Bounds Read via prores_ks Interlaced Alpha Encoding

FFmpeg through 9.0.2 contains an out-of-bounds read vulnerability in the prores_ks encoder's get_alpha_data() that reads before the blocks buffer for interlaced frames with odd heights. Attackers can supply video with alpha and odd height encoded to interlaced ProRes 4444, causing out-of-bounds memory to be encoded into the output alpha plane.

CVSS 4.0 · 2 Low EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125202

FFmpeg through 9.0.2 Heap Buffer Overflow via HEVC VAAPI Tile Arrays

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in vaapi_hevc_start_frame() in libavcodec/vaapi_hevc.c that copies unbounded PPS tile counts into fixed-size arrays. Attackers can supply a crafted HEVC bitstream with a large picture and many tiles to write controlled 16-bit values past heap-allocated hwaccel data, corrupting memory in applications decoding with VAAPI.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125201

FFmpeg 7.0 before 8.1.3 and 9.x before 9.0.2 Heap Overflow via vulkan_av1.c

FFmpeg 7.0 before 8.1.3 and 9.x before 9.0.2 contains a heap out-of-bounds write vulnerability in vk_av1_decode_slice() in libavcodec/vulkan_av1.c because the tile-count limit is checked only on entry. Attackers can supply a crafted AV1 stream with more than 256 tiles decoded via the Vulkan hardware accelerator to overflow tile_sizes and corrupt heap memory.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125198

FFmpeg through 9.0.2 Memory Leak via MediaCodec JNI setBuffer

FFmpeg through 9.0.2 contains a memory leak vulnerability in mediaformat_jni_setBuffer() in libavcodec/mediacodec_wrapper.c that never frees buffers wrapped with NewDirectByteBuffer(). Attackers can supply crafted media files with large extradata, leaking native memory on each MediaCodec decoder configuration in Android applications and causing resource exhaustion.

CVSS 4.0 · 2 Low EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125197

FFmpeg through 9.0.2 Heap Out-of-Bounds Read via LCL/ZLIB Multithread Decoding

FFmpeg through 9.0.2 contains an integer underflow in decode_frame() in libavcodec/lcldec.c that allows attackers to trigger a heap out-of-bounds read via short ZLIB packets with FLAG_MULTITHREAD. Attackers can supply a crafted AVI or MKV file with an LCL video stream whose packet is shorter than 8 bytes, bypassing length clamping to crash the decoding application.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125193

FFmpeg through 9.0.2 Out-of-Bounds Read via bitpacked_decode_uyvy422()

FFmpeg through 9.0.2 contains an out-of-bounds read vulnerability in bitpacked_decode_uyvy422() in libavcodec/bitpacked_dec.c because it never verifies packets hold width * height * 2 bytes. Attackers can supply truncated bitpacked UYVY422 packets via crafted SDP/RFC 4175 RTP sessions or raw input to crash applications or expose adjacent heap memory.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125190

FFmpeg through 9.0.2 Uninitialized Stack Memory Disclosure via MVC2 Decoder

FFmpeg through 9.0.2 contains an information disclosure vulnerability in decode_mvc2() in libavcodec/mvcdec.c that leaks uninitialized stack memory through unchecked palette indices. Attackers can supply a crafted MVC2 stream declaring few colors but referencing higher palette indices, copying process stack contents into decoded RGB frames.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125182

FFmpeg through 9.0.2 Out-of-Bounds Read via Cook Decoder js_subband_start

FFmpeg through 9.0.2 contains an out-of-bounds read vulnerability in the Cook decoder joint_decode() function because cook_decode_init() does not check js_subband_start against subbands. Attackers can supply a crafted RealMedia file whose extradata causes reads past decode_buffer_0, leaking pointers and decoder state into decoded audio to help defeat ASLR.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125181

FFmpeg through 9.0.2 FLIC Decoder Out-of-Bounds Write via FLI_BRUN Byte Swap

FFmpeg through 9.0.2 contains an out-of-bounds write vulnerability in flic_decode_frame_15_16BPP() in libavcodec/flicvideo.c that allows attackers to corrupt heap memory on big-endian builds. Attackers can supply a crafted 15/16 bpp FLIC/FLX file with an FLI_BRUN chunk whose non-terminating byte-swap loop writes packet-derived data past the frame buffer, crashing the process.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125178

FFmpeg through 9.0.2 Out-of-Bounds Heap Read via TDSC Cursor Dimensions

FFmpeg through 9.0.2 contains an out-of-bounds heap read vulnerability in tdsc_load_cursor() in libavcodec/tdsc.c, which stores cursor dimensions before validating them. Attackers can supply a crafted AVI file with oversized TDSC cursor dimensions so tdsc_paint_cursor() reads past the cursor buffer, crashing the decoder or leaking heap memory into frames.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125177

FFmpeg through 9.0.2 Uninitialized Heap Memory Disclosure via MSCC/SRGC Decoder

FFmpeg through 9.0.2 contains an information disclosure vulnerability in the MSCC/SRGC decoder in libavcodec/mscc.c that outputs uninitialized heap bytes when RLE data ends early. Attackers can craft an MSCC or SRGC stream, such as in AVI, whose RLE data terminates early so the decoded frame exposes leftover heap memory to viewers of the output.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125170

FFmpeg through 9.0.2 Uninitialized Memory Disclosure via targa_decode_rle()

FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in targa_decode_rle() in libavcodec/targa.c caused by missing packet length checks. Attackers can supply truncated RLE-compressed TGA images so decoded frames contain leftover heap buffer data and replicated uninitialized stack bytes.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-125101

FFmpeg through 9.0.2 VMnc Decoder Uninitialized Heap Memory Disclosure

FFmpeg through 9.0.2 contains an information disclosure vulnerability in the VMnc decoder in libavcodec/vmnc.c that restores an unwritten cursor save area into later frames. Attackers can supply a crafted VMnc stream where a frame fails after loading a cursor shape, causing uninitialized heap bytes from screendta to appear in decoded output.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg